/*
 * Copyright (C) 2010 M. Hautle.
 * 
 * This file is part of SimpleEL.
 * 
 * SimpleEL is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 * SimpleEL is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License along with SimpleEL. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.simpleel.internal.asm;

/**
 * Interface of classes providing access to a specific property.<br>
 * Only for internal use!
 * 
 * @author M. Hautle
 */
public interface ISinglePropertyAccessor {
    /** Undefined value. */
    public static final Object UNDEFINED = new Object();

    /**
     * Returns the value of the property.
     * 
     * @param bean The bean
     * @return The value of the property or {@link #UNDEFINED} if the property is not readable
     * @throws Exception If something went wrong
     */
    Object get(Object bean) throws Exception;

    /**
     * Sets the value of the property.
     * 
     * @param bean The bean
     * @param value The value to set
     * @return True if the property is writable
     * @throws Exception If something went wrong
     */
    boolean set(Object bean, Object value) throws Exception;
}
